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If ΔGdegrees = 27.1 kJ at 25 degrees C for the reaction CH3COOH(aq) + H2O(l) → CH3COO^-(aq) + H30^+(aq), calculate Ka for this reaction at 298 K. 1. 1.15 x 10^-11 2. 9.89 x 10^-1 3. 5.63 x 10^-5 4. 1.78 x 10^-5 5. 1.01